From patchwork Sat Feb 12 18:21:17 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Manivannan Sadhasivam X-Patchwork-Id: 12744405 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4605DC433EF for ; Sat, 12 Feb 2022 18:24:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230338AbiBLSYQ (ORCPT ); Sat, 12 Feb 2022 13:24:16 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:48286 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230334AbiBLSYA (ORCPT ); Sat, 12 Feb 2022 13:24:00 -0500 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AF9685B3C1 for ; Sat, 12 Feb 2022 10:23:43 -0800 (PST) Received: by mail-pf1-x42f.google.com with SMTP id i30so21935181pfk.8 for ; Sat, 12 Feb 2022 10:23:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Au/mBqZaaQyBAGIOH8RzJibxV3VU/TZF+4arCyxvGTY=; b=KaOcepOdTQrhOR4AS8lQLqlzl7Q6jPb8Sp1fugWR2kck0NPwQOzIORI/gBTLGakR4r mta45Y/42w3HqwzwIkj6/ojghtSL2zLxZSBpfu9ehwvYwIpoTvRW9Tvpz3in4vnCEXkX etExvaeN8yYqmfniJum7ZrW+ExsK/EbPbwQaV/CTek6eZeKRGbPQVtdK+mYLrQBwiAet eXOKCOjgl+MtnfuOPNBYlWkoge4EMEZS7GG+887shkuPAZHEf9UZq+4UwPSAkY4WSZPo J4DJGVCOkVws3RtTh4QeGywhQzxrF7Fkm1qC38o8B6Zd71tcdeNXSX1v2y/8iE4QYkwF u0mA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Au/mBqZaaQyBAGIOH8RzJibxV3VU/TZF+4arCyxvGTY=; b=xtJjc1vIWWbP9p7nMaooXiWJ+WjW8mr/JlhIgFiK2XnOxFEbRGPALIUIS33+Yah/cB bdx19PTB5XguzGKRxPkuOGuGUoekJElRYm8gix70jenT5tXGZ9w1L/JVoSI4GYfc0tIs 8ASMatC1XkNNw9A+qdg4iTEE0UvTOCZiPSaoKz0qVAP+8yZviUvM0je0GI6GW5h2gWBP 40vpX3FquTYPE/DqSOG7jBmzQiFMXRqVz/uNqNqhlpJ3wt88rA+FvfbOR57spoMH0zrx IQaMq9bP1z4GfxMacvMVNpbuYDl9HvxIwPj/U6O/54YTrOicywmvB3+VgbOFjzs44l5p DHMA== X-Gm-Message-State: AOAM530fLAIi4JCraQUGIWXgsVyitCZ1F8Iobvb19y3t9dhi1k9P1efG ixgALaaZKbSkZyCIOl2Z6tpt X-Google-Smtp-Source: ABdhPJw7rtn/EqYS4Ti9SeALK9sOS/Hq/eKqV26Px0lGVYCc+iEb1T9YnhTUhEymkPvN7SoJF+YBNQ== X-Received: by 2002:a63:4903:: with SMTP id w3mr5749982pga.5.1644690222170; Sat, 12 Feb 2022 10:23:42 -0800 (PST) Received: from localhost.localdomain ([27.111.75.57]) by smtp.gmail.com with ESMTPSA id g12sm14961987pfj.148.2022.02.12.10.23.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Feb 2022 10:23:41 -0800 (PST) From: Manivannan Sadhasivam To: mhi@lists.linux.dev Cc: quic_hemantk@quicinc.com, quic_bbhatt@quicinc.com, quic_jhugo@quicinc.com, vinod.koul@linaro.org, bjorn.andersson@linaro.org, dmitry.baryshkov@linaro.org, quic_vbadigan@quicinc.com, quic_cang@quicinc.com, quic_skananth@quicinc.com, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, elder@linaro.org, Manivannan Sadhasivam Subject: [PATCH v3 25/25] bus: mhi: ep: Add uevent support for module autoloading Date: Sat, 12 Feb 2022 23:51:17 +0530 Message-Id: <20220212182117.49438-26-manivannan.sadhasivam@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220212182117.49438-1-manivannan.sadhasivam@linaro.org> References: <20220212182117.49438-1-manivannan.sadhasivam@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add uevent support to MHI endpoint bus so that the client drivers can be autoloaded by udev when the MHI endpoint devices gets created. The client drivers are expected to provide MODULE_DEVICE_TABLE with the MHI id_table struct so that the alias can be exported. The MHI endpoint reused the mhi_device_id structure of the MHI bus. Signed-off-by: Manivannan Sadhasivam Reviewed-by: Alex Elder --- drivers/bus/mhi/ep/main.c | 9 +++++++++ include/linux/mod_devicetable.h | 2 ++ scripts/mod/file2alias.c | 10 ++++++++++ 3 files changed, 21 insertions(+) diff --git a/drivers/bus/mhi/ep/main.c b/drivers/bus/mhi/ep/main.c index 315409705b91..8889382ee8d0 100644 --- a/drivers/bus/mhi/ep/main.c +++ b/drivers/bus/mhi/ep/main.c @@ -1546,6 +1546,14 @@ void mhi_ep_driver_unregister(struct mhi_ep_driver *mhi_drv) } EXPORT_SYMBOL_GPL(mhi_ep_driver_unregister); +static int mhi_ep_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev); + + return add_uevent_var(env, "MODALIAS=" MHI_EP_DEVICE_MODALIAS_FMT, + mhi_dev->name); +} + static int mhi_ep_match(struct device *dev, struct device_driver *drv) { struct mhi_ep_device *mhi_dev = to_mhi_ep_device(dev); @@ -1572,6 +1580,7 @@ struct bus_type mhi_ep_bus_type = { .name = "mhi_ep", .dev_name = "mhi_ep", .match = mhi_ep_match, + .uevent = mhi_ep_uevent, }; static int __init mhi_ep_init(void) diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h index 4bb71979a8fd..0cff19bd72bf 100644 --- a/include/linux/mod_devicetable.h +++ b/include/linux/mod_devicetable.h @@ -835,6 +835,8 @@ struct wmi_device_id { #define MHI_DEVICE_MODALIAS_FMT "mhi:%s" #define MHI_NAME_SIZE 32 +#define MHI_EP_DEVICE_MODALIAS_FMT "mhi_ep:%s" + /** * struct mhi_device_id - MHI device identification * @chan: MHI channel name diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 5258247d78ac..d9d6a31446ea 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -1391,6 +1391,15 @@ static int do_mhi_entry(const char *filename, void *symval, char *alias) return 1; } +/* Looks like: mhi_ep:S */ +static int do_mhi_ep_entry(const char *filename, void *symval, char *alias) +{ + DEF_FIELD_ADDR(symval, mhi_device_id, chan); + sprintf(alias, MHI_EP_DEVICE_MODALIAS_FMT, *chan); + + return 1; +} + /* Looks like: ishtp:{guid} */ static int do_ishtp_entry(const char *filename, void *symval, char *alias) { @@ -1519,6 +1528,7 @@ static const struct devtable devtable[] = { {"tee", SIZE_tee_client_device_id, do_tee_entry}, {"wmi", SIZE_wmi_device_id, do_wmi_entry}, {"mhi", SIZE_mhi_device_id, do_mhi_entry}, + {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry}, {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, {"ssam", SIZE_ssam_device_id, do_ssam_entry}, {"dfl", SIZE_dfl_device_id, do_dfl_entry},